WorksheetsEDC EXAM
Total questions: 19
Worksheet time: 10mins
RC coupling is used for............. amplification
voltage
current
power
none of these
when a multi stage amplifier is to amplify dc signal , then one must use ........... coupling
RC
Transformer
Direct
None of the above
In practice ,voltage gain is expressed ..........
in dB
in volts
as a number
none of the above
The lower and upper cut off frequencies are also called as ........ frequencies
side band
resonant
half resonant
half power
The bandwidth of a single stage amplifier is ....... that of a multi stage amplifier
more than
the same as
less than
data insufficient
The gain of amplifier is expressed in dB because ........
it is a simple unit
calculations becomes easy
human ear response is logarithmic
none of the above
Transformer coupling is generally employed when load resistance is ........
large
very large
small
none of the above
The final stage of multi stage amplifier uses .....
RC coupling
transformer coupling
direct coupling
impedance coupling
A tuned amplifier uses ........... load
resistive
capacitive
LC tank
inductive
A tuned amplifier is generally operated in ........ operation
class A
class B
class C
none of these
The voltage gain of tuned amplifier is ........ at resonant frequency
minimum
maximum
half way between maximum and minimum
zero
At series resonance , the circuit offers ....... impedance
zero
maximum
minimum
none of thse
As XL = XC in a series resonance circuit, the impedance is_________
purely capacitive
purely inductive
purely resistive
capacitive and inductive
The expression of resonant frequency in a series resonant circuit is?
1/(2π√LC)
1/(2π√C)
1/( 2π√L)
2π√LC
The Q factor of a tuned amplifier is equal to the ratio of resonant frequency to ...........
bandwidth
cutoff frequency
gain
resistance
If Q of an LC circuit increases , then bandwidth ......
increases
decreases
remains constant
insufficient data
power amplifiers handle ........... signals as compared to volage amplifiers
small
very small
large
none of he above
class ........ gives the maximum distortion
A
B
C
AB
Low efficiency of a power amplifier results in ........
low forward bias
less battery consumption
more battery consumption
none of the above
